Heater



FIG. 1 is a top perspective view of a heater showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a first side view thereof, where the side view opposite theview of FIG. 3 is identical to FIG. 3;

FIG. 4 is a second side view thereof, where the side view opposite theview of FIG. 4 is identical to FIG. 4;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof, opposite the view of FIG. 5.

The evenly spaced broken lines depict portions of the heater that formno part of the claimed design; the dash-dot broken lines define theboundary of the claimed design and form no part thereof.

CLAIM The ornamental design for a heater, as shown and described.